Bicycle chain stay



FIG. 1 is a right side perspective view of a bicycle chain stay in accordance with my new design;

FIG. 2 is a right side elevational view of the bicycle chain stay in accordance with my new design;

FIG. 3 is a left side elevational view of the bicycle chain stay in accordance with my new design;

FIG. 4 is a front end elevational view of the bicycle chain stay in accordance with my new design;

FIG. 5 is a rear end elevational view of the bicycle chain stay in accordance with my new design;

FIG. 6 is a top plan view of the bicycle chain stay in accordance with my new design; and,

FIG. 7 is a bottom plan view of the bicycle chain stay in accordance with my new design.

The broken line showing of environment (the remaining structure of the bicycle frame) in the Figures is for illustrative purposes only and forms no part of the claimed design. Also portions of the bicycle chain stay that are obstructed from being seen by other portions of the frame form no part of the claimed design. 

The ornamental design for a bicycle chain stay, as shown and described. 